Valve mechanism for explosion-engines.



(LR. GREUTER. VALVE. MECHANISM FOR EXPLOSION ENGINES.

I APPLIGATION FILED APR. 17, 1909. 987,801 Patented Mar.28, 1911.

2 SHEETS-SHEET 1.

. 6M [/W ENTO/Q Affowzqy G. R. GRBUTER.

VALVE MECHANISM FOR EXPLOSION ENGINES.

APPLICATION FILED APR.17, 1909.

Patented Mar. 28, 1911 2 SHEETS-SHEET Wm m UNITED STATES PATENT OFFICE.

CHARLES IL. GREUTEB, O]? SAUGTIS, MASSACHUSETTS.

ALV'E MECHANISM. FOR EXELOSION-ENGINES.

Specification of Letters Patent.

Patented Mar. 28, 1911.

Application filed April 17, 1909. Serial No. 490,482. I

10 all whom it may concern:

Be it known that T, CHARLES R. .a citizen of the United States, and a resident of Saugugin the county of Essex and State of Massachusetts, have invented a cer;

tain new and useful Improvement in Value .lliechzinisn'is for Explosioi'iEngn1es, 01 which tll'e'following is a specification.

The presentinvention relates more ticularly to the valve mechanism of explos on engines, and especially to the type, in which a tubular valve controlling the ex- .haust is ei'nployed, forming a assage through range the controlling springs that they are located'ivholly out of the rangeot heat train,

the exhaust.

Still. another object is to construct vzilve casing that it constitutes in the strict sense of the term of head "for the cylinder,

- said head also forming a valve casing with a Water jacket in which the Water 15 brought into close association with the valve seats.

The preferred embodiment of the invention is illustrated in the accompanying (.i'llLW- ings, .Wherein.:-

Figure 1 a vertical sectional view through a portion of an explosive ei'lgii'ie. .Fig. 9 is a top plan view of the head casting. Fig. 3 is a side elevation of: the son c. Fig. 4- is a horizontal sectional view therethrougl'i.

Similar reference numerals designate cor-q responding partsin all the figures of the drawing.

In said drawings, the cylinder is designated 1, and operating therein, is the usual piston 2. Secured to the rear end of the cylinder 1, is a valve casin constitutinga. cylinder head. it will be observed that in this structure, the term head used properly, for upon the removal of the casing or head 3, the piston can be removedthrough the open end of the cylinder. This hca'd3 is provided with a .rcm'wardly contracted chamber 1 terminating in a valve seat 5 that surrounds a passage cmm'nunicnting with an exhaust chamber 6. The chamber has a port 7 opening through one side of the cas inn. The rear Wall of this chamber is a Gnnorsn,

projecting end carrying a head 25.

partition 8, in rear of which is an intake chamber 9 having a rear Wall 10 that constitutes the rear all of the head. The intake chamber 9 is provided in the same side as the port 7 With a port 11, and said ports 7 and 11 register With the ends of exhaust and intakepipes 12 and 1.3, which are spaced apart, as shown. A yoke 1-l has. its ends bearing upon the pipes over the ports, and a stud bolt 15 projecting from. the casing between the pipes, passes through the yoke 1.4;, and has a nut 1.6 threaded upon its outer end.

The partition 8 is provided with a sleeve portion. 17, in line with the passage that communicates with the chamber 4, and n. tubular valve 18, bridging the Q.\ll8li;-t1(2l121111- her 6, has its inner portion cooperating with the valve seat/5, and has a sliduble bearing 19 in the sleeve portion 17. This bearing is preferably provided with a pitching ring 20, which is lubricated by means of an annular .groove 21 and an oil pipe 22 leading thereto.

it Wlll be observed that the valve 18' has a' peripl' eral channel located in the exhaust chamber (5, this channel." a llerdiug sutlieient.

clearance when thevalveis opened and tend ingto direct the exhaustoutwurd, as will be obvious. The valve furthermore has 11 tubular stem 2% slulahly n'iountcd in the veer.

wall 10 and projecting; beyond. the same, its v Acoiled spring 20, hearing at one end against the well, .also has a hearing against the inner side of the head 25, thus normally main taining' the tubular valve in closed position.

A. lever 27 lulcrumed between its ends. 21's shown at 2-8, has at itsinner end a yoke 29 that bears upon the-head 4. A valve actlmting rod illhoperated by any suitable and well know-n means, provided for actuating the lever 27, and consequently-tile "alve to unseat the same.

The inner end of the valve constitutes seat 31, with which cooperates a second valve 32 controlling the intake, said intake passing from the chamber 1) through the valve 18, will be obvious. The valve has a stem 33 which slidably'pzisscs through the tubular stem 24 and. projects beyond. the

same, its projecting end being provided with a head 34:. A lever 35, fulerumml between its ends, as shown at 36, has its inner end hearing against the head, while a suitable actuating rod 37, operating aguinst'the outer end of the lever, moves the same periodically to open theva-lve 32. The projecting portions of the stems are surrounded by suitable casings 38 and 39, and aspring 40, housed within the casing 39, bears against the head 34 to normally hold the valve 32 seated.

It will be observed that the cylinder 1 has a suitable Water jacket 41, and the valve casing also has a, Water jacket 42, the latter being so arranged that water is carried into juxtaposition to the valve seat 5, and the sliding bearing. The two jackets are provided in one side With ports 43, and a cow pling conduit 44 having ears bolted, as indicated at l5, is provided with ports that register with the ports 1-8.

It is to be understood that the principal advantages claimed are rendered possible by the peculiar formation of theexhaust valve and the parts cooperating therewith. Said valve, While of general hourglass form, has its central portion in longitudinal sec tion constructed on a curve of relatively small radius, which curve extends to a curve of larger radius toward the seating and of said valve facing the cylinder, and the cylinder head is gradually tapered inward to the valve-seating point, the curve thereof merging into the curveor" the exterior of the exhaust valve, the tWo forming substantially an ogee curve. This construction obtains an e icient and unobstructed injector inlet action for the incoming charge through the interior of the valve and at the same time a smoothly directed and unobstructed exhaustover the exterior thereof.

With this construction, it will be noted that both valves are unseated by positive mechanism. Furthermore the parts subjected to the heat of the exhaust are properly cooled, In addition, the springs and operatingmechanisms for the valves ar e located entirely away from the heat from the eX- haust, being. disposed outside the valve casing.

Having thus fully described my invention, What I claim as new, and desire to secure by Letters Patent, is I i l.'II1 combination, acylinder head having an inward taper in longitudinal section to the valve seat forming at the extre lnity of said taper a valve seat, a tubular exhaust valve of hourglass form adapted to engage said seat, the cooperating portion of sa d 'alve'being formed on a taper merging into that of the cylinder head, and a second valve adapted to seat on the end of the tubular valve.

2. In combination, a cylinder head, inwardly tapering in longitudinal section, forming at the extremity thereof a valve seat, a tubular valve of hourglass form adapted to engage said seat, the central por tion of said valve bein formed on a curve of relatively small radius and extending to a curve of larger radius merging into the taper of said cylinder head, and a second valve adapted to seat on the end of said tubular valve,

3. In combination, a cylinder head in wardly curved in longitudinal section, form ing at the extremity thereof a valve seat, a tubular valve of hourglass form adapted to engage said seat, the central portion of said Y valve being fori'ned on a curve of relatively smalhradius and extending in a curve ofv prising an exhaust 'valve of tubular hourglass shape, formed longitudinally on a curve of relatively small radius at its center, extending in a curve of increasing radius toward the cylinderdacing end thereof, and having a piston formation at the other end thereof, and an inlet valve guided. in saidexhaust valve and adapted to seat on the end thereof.

Signed at Boston in the county of Suffolk and State of Massachusetts this 12th day of April, A. D. 1909.

CHARLES R. GREUTER, Witnesses:

WALTER Sco'r'r,

Enw. H. BUCKBEE. 

